Project Euler visualizations - problem 144

Here’s another nifty Project Euler visualization, one I put together while solving problem 144 a while ago.

The initial angle settings of the widget match the problem statement, though I’ve capped the number of reflections shown at 100 (spoiler: the solution to the problem is more than 100).  You can also play around and change the angle and position of the initial beam to whatever you want.

Note: At the time of writing, CDFs don’t work in IE11 unless you put the hosting site in the Compatibility Mode list.  I suggest using Chrome to view this post.